Anthropogenic Contamination
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. Avaliação da contaminação de metais em sedimentos superficiais das praias do lago de Itaipu
This work was performed to evaluate the distribution of metals Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn in the sediment surface in the Itaipu Lake-PR-Brazil. It was also performed to measurement the pH, phosphorus, organic carbon and particle size. In accordance of international criteria of quality of sediment, the results indicate an anthropogenic collaboratio
Química Nova. Publicado em: 2010
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14. Avaliação de parâmetros limnológicos, parasitas, bactérias e metais pesados em água superficial no córrego Ribeirão Preto, Ribeirão Preto - SP / Evaluation of limnological parameters, parasites, bacteria and heavy metals in superficial water of Ribeirão Preto Stream, Ribeirão Preto-SP.
Water is fundamental to life. Its multiple uses are needed for a broad spectrum of human activities, among which stand out, the public and industrial supply, agricultural irrigation, the production of electricity and leisure activities and recreation. It is known that Brazil still has a privileged position of water quantity and quality, but their use hasnt b
Publicado em: 2010
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15. Metais pesados e micronutrientes no solo e em folhas de Brachiaria decumbens às margens de rodovias / Heavy metals and micronutrients in soil and in leaves of Brachiaria decumbens on the margins of highways
The generation of various wastes, has become alarming in light of their growing volume and their disposal to form inappropriate, especially in soil. One of the characteristics of such waste is the possibility of being contaminated by heavy metals. The Fuel obtained the refining of oil, widely used in automobiles, are usually enriched with toxic elements. The
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2009
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16. Diversity of Chitinolytic bacteria isolated from seawater and plankton samples collected at São Paulo Coast, Brazil. / Diversidade de bactérias quitinolíticas isoladas em amostras de água do mar e plâncton coletadas na região costeira do estado de São Paulo.
Chitinolytic bacteria are autochthonous in marine ecosystems and have an important role in chitin degradation process. A very little is know about the diversity and enzymatic potential of chitinolytic bacteria isolated from coastal tropical environments. Seawater and plankton samples were collected at Canal de São Sebastião, Baixada Santista and Ubatuba. C
Publicado em: 2009
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17. AvaliaÃÃo das concentraÃÃes de elementos quÃmicos nos sedimentos de fundo do estuÃrio do Rio Formoso (PE)
The estuary of Formoso river is located in the south coastal zone of the Pernambuco state, in an environmental protection area, named APA of Guadalupe. This is an important coastal ecosystem with a rich biodiversity, which plays an important socioeconomic role for the local population. Anthropogenic activities such as shrimp farming, sugar cane cultivation,
Publicado em: 2009
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18. Hidrocarbonetos e esterois como indicadores de fontes e destino de matéria orgânica em sedimentos da Baía de Sepetiba, Rio de Janeiro
The inputs of organic matter derived from natural and anthropogenic sources to Sepetiba Bay were investigated by using aliphatic hydrocarbons and sterols in superficial sediments. Concentrations ranged from 0.26 to 2.65 μg g-1, <0.01 to 17.41 μg g-1 and 0.77 and 9.24 μg g-1 for n-alkanes, UCM (unresolved complex mixture) and total sterols, respectively. T
Química Nova. Publicado em: 2009
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19. Efeitos do acetato de chumbo em tecido ósseo de ratos
Lead is a ubiquitous pollutant in the environmental ecosystem which distribution is mainly anthropogenic, come from burning fossil fuels, mining and various industrial products. There is little knowledge of the involvement of this element on the bone metabolism. This study aimed to determine possible changes in adult rat bone, contaminated with lead acetate
Publicado em: 2009
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20. INTERMITTENT AND CONTINUOS FLOODING IN RICE: WATER USE, AGRONOMIC EFFICIENCY AND IMAZETHAPYR, IMAZAPIC AND FIPRONIL DISSIPATION / IRRIGAÇÃO CONTÍNUA E INTERMITENTE EM ARROZ IRRIGADO: USO DE ÁGUA, EFICIÊNCIA AGRONÔMICA E DISSIPAÇÃO DE IMAZETHAPYR, IMAZAPIC E FIPRONIL
Every anthropogenic activity causes environmental impact in some extent. Rice paddy fields area are pointed out as an activity with high potential of pollution due to the large amount of water used to maintain the flooding and the intensive use of pesticides and nutrients that can be transported to the environment. Though, there are other irrigation manageme
Publicado em: 2009
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21. Assessment of the contamination of the main water bodies in São Carlos/SP / Avaliação da contaminação nos principais corpos dágua do município de São Carlos/SP
Os corpos dágua do município de São Carlos/SP recebem esgotos domésticos, efluentes industriais e agrícolas, de tal forma que se propôs neste trabalho a identificação de possíveis correlações entre a contaminação antropogênica dos cursos dágua com as fontes poluidoras. Escolheram-se 27 pontos de amostragem - localizados de maneira estratégica
Publicado em: 2009
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22. Estudo da remoção e toxicidade dos pesticidas atrazina e oxifluorfem pela cianobactéria "Microcystis novacekii" em condições de cultivo.
Water contamination by pesticides due to anthropogenic activities has become a global concern in terms of environmental damage and public health. The cyanobacteria are microrganisms capable of growing in polluted environments and their potential as agents of bioremediation of contaminated environments is promising. This study aimed to evaluate the potential
Publicado em: 2009
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23. DETERMINATION OF SN IN HUMAN MILK BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY / DETERMINAÇÃO DE SN EM LEITE HUMANO POR ESPECTROMETRIA DE ABSORÇÃO ATÔMICA NO FORNO DE GRAFITE
Tin is a metal of natural occurrence which is mainly extracted from the mineral cassiterite, SnO2. Tin may be released to the atmosphere from both natural and anthropogenic sources. In nature, it occurs in both inorganic and organic forms, and the shorter the organic chain associated to the metal, the higher the toxicity of the compound. Organotin compounds
Publicado em: 2008
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24. IRRIGAÇÃO E SUSTENTABILIDADE DOS RECURSOS SOLO E ÁGUA NA ÁREA DO DISTRITO DE IRRIGAÇÃO BAIXO ACARAÚ-DIBAU- CEARÁ / IRRIGATION AND SUSTAINABILITY OF SOIL AND WATER RESOURCES IN THE AREA IRRIGATION DISTRICT OF BAIXO ACARAÚ-DIBAU-CEARÁ
Irrigation is an essential input that has enhanced, substantially, food production and has improved economic development in arid regions. Irrigation, also, has generated negative impacts to the environment and to human health. The aim of this work was to quantify and qualify the irrigation impacts and of the climatic seasonality over soil and water resource
Publicado em: 2007